Thermal ink jet printing apparatus

Details Thermal ink jet printing apparatus Thermal ink jet printing apparatus

1991-07-24

1992-10-13

Fuller, Benjamin R.

Recorders

Markers and/or driving means therefor

With ink supply to marker

346 75, B41J 205

Patent

active

051555042

ABSTRACT:
A thermal ink jet printing apparatus has a film having a number of small apertures formed in the front thereof and retaining liquid ink in the apertures. The film is located to face a thermal head having heating elements. As the heating elements are selectively energized in response to a signal representative of a particular image pattern, the ink in the apertures evaporates to exert a pressure on the ink. As a result, the ink is ejected toward a recording medium to form an image thereon. An ink retaining layer is provided on the rear of the film and communicated to the apertures. Alternatively, an ink well may be formed in a portion of the thermal head that faces the rear of the film and communicated to the apertures.

REFERENCES:
patent: 3834301 (1974-09-01), Croquelois et al.
patent: 4623906 (1986-11-01), Chandrashekhar
patent: 4679058 (1987-07-01), Hori
patent: 4725860 (1988-07-01), Kohyama et al.
patent: 4751534 (1988-06-01), Elrod et al.

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